Percolator.



W l D. COLLINS.

PERCOLAIOR. 1 APPLICATION FILED .MAY 27. 1914. L. Patented Apr; 2o,1915. 3 SHEETS-SHEET l.

W.'D. COLLINS.

PERCOLATOR.

APPLICATIN'HLED MAY 27.1914.

Patented Apr. 20, 1915.

('HEETS-SHBET 3.

animan entras @Parana .ernten WILLIAM n. COLLINS, er NEW YORK, N. Y.

PERCOLATOR.

Application ile'd May 27, 1914. Serial N o. 841,243.

To allwtom it may concern:

-Be it known that I, WILLIAM D. COLLINS,

a citizen'of the United States, and a resireceptacle for the liquidcoffee; to avoid cooling the heated lwater while elevating the same fordelivery upon the coffee pack and also avoid heating the liquid coffeein its receptacle; and to avoid breaking the glass cover with` which theouter receptacle is provided.

. DrawingsrFigure 1 is a side view, partlyV in section, lof a percolatorconstructed'and arranged in accordancewith thepresent invention'; Fig.v2 is a horizontal section taken on the line 2,-2 in Fig. 1; Fig. 3 is avhorizontal sectionitaken on the line 3 3 in Fig. 1. Fig. 4 isaverticalsection of the liquid coffee container, .the groundcofleeholder, and the coverfor'V `said holder, said parts being shownindisassociated rotation.

I Description: In'v the conventional form, of percolators, the coffeepack lholder is employed in conjunction lWith,and is support-` ed by,acentral tube, the lower end of which is arranged to trap a relativelysmall quantity of hot water,-and to produce steam to elevate the. Water,`for the deliveryfthereof overl and uponthe pack or' confined Y vground-orcfpujlverulentvco'ee beans.' This relatively superheated Water' ipercolates througlnthecoffee VVpack;extracting the essence ltherefrom todrip into the main body of water Vin the percolator receptacle orcoffee-pot'. The main body of the Watergbeing relatively cooler thanthat which has been passedthrough the coffee pack, op-` erates to reducethe temperature of 4the liquid coffeethus introduced into the body ofthewater. The continuation of theoperation ultimately equalizes thetemperatures of the main body of water and the liquid which has passedthrough the pack.

At the termination of the operation, the liquid coffee is discovered tohave been boiled afterV the essence has been extracted from the coffeepack. If this operation be Specification of Letters Patent.

Patented Apr. 20, 1915.

continued beyond a certain point, it will be found that the coffeeisbitter, or that the iavor thereof has been otherwise impaired.

In the present invention, the above objection is avoided by employing.aliquid-cofee container 8. The container 8 is provided with a centralvertically-disposedl tube 9. 'The i -edge of the container 8 may, at thebeginning of the operation of making the coffee, extend to or above theupper edge of the coffee-holder 13. As the operation of making'thecoffee is proceeded with, the relation of the container 8 and the holder13 changes, until at the completion of the operation, the upper edge ofthe container 8 rests below the level of the bottom of the holder 13.

The column4 10 is preferably provided with an interior Wall'14. ThisVwall is rigidly or integrally connected with an inverted :truste-conicalbase 15. The wall 14 is covered with a' heat-insulating lining 16. Theinsulating lining 16 is covered by an exterior tube 17. The Wall 1.4 andthe tube 17 are constructed. of metal, and thejoint at ,the bottom ofthe tube 17 with the base 1 5 is constructed to prevent the intrusion ofWaterto the lining 16.V Thisconstruction of the column 1Q. providesmeans for preventing the cooling of the Water when passing upwardthrouglic-said column due to thel vpresence of ,a relatively cooler massin the body off'the water 11 in the pot 12. The construction also makesprovision against the heating of the liquid coffee by the rising columnof Water, .which might otherwise happen. A'The upper end of the column10 is contractedto it the tapered end of said.

column 10, vwhen the holderlis deposited upon the column 10. This occurswhen the containerv 8 settlesl or falls in the pot 12, due

. .L l to the transfer of water from said pot to l said container.

. 20 is supported upon What is herein styled the coffee pack, indicatedin the drawings by the number 20, is the mass of ground or pulverizedcoffee which is placedin the holder 13 when said holder is mounted onthe column 10. v DurJ ing the operation of coffee making, the pack theperforated' bottom of the holder 13, as in the conventionalconstructions, the perforations in said bottom being reduced so as notto permit the coffee particles to pass therethrough. 'llhe particles areprevented from swelling upward4 out of lsaid holder if the delivery ofwater be too rapid, by a cover 21, which is likewise perforated.

The cover 21 has an upstanding flange 22 adapted to hold or concentratelthe flood of water The cover 21 has a centrally-disposed nlp- I ple 23.-The upper end of said nipple'is conl been placed on said column 10.

The pot 12 is preferably supported by. al

base 24. The base 21 in the present instance is mounted on the pot bymeans of a screwthreaded hollow boss 25. It will be observed that thelower end of lthe boss 25 opens within the interior or Ichamber of thebase 15 of the column 10. The lower 'edge of the base 15 is not, as informer constructions, provided with special openingsor channels :for theadmission of the water lfrom the body of the pot 12, it being desired tolimit the escape of water therefrom. The water in the column 10 isthereby heated more rapidly than byrconventional heaters, prior Ato.being delivered by said column to the holder 13.

It will be understood that when the water trapped .below the basel 15 issufiiciently heated to lift the water in the column 10,

, the surrounding water will. flow under the `base 15 to replace theheated water that has beenv forced upward through said column. While nospecial preparation is made for. the introduction of water beneath thean.- nular edge of the base 15, it will be understood that water is'always present under 'the said base. Further, it will be seen that byreason of the relatively close lit of the edge of the base 15 with thebottom o f the receptacle the full lifting force of the water trappedunder the said base is exerted to: lift or pump the water up the saidcolumn 10.

The pot 12 is provided with a cover 28', preferably constructed fromglass and having a hollow knob `29 .centrally disposed'v deliveredthereto by the column 10.

thereon. The knob A29 provides within the cover 28 a seat for a metalspreader 26. The

lspreader 26 is supported, when the cover is spreader isprovided withrecesses 31, which recesses aline with, and permit the passagetherethrough, of the tabs 30. This construction may be modified by'suspending the spreader from the hollow in the knob with which thecover 28 is usually provided.

ToV assist in handlin the spreader 26, a

slot 32 is formed therein toreceive the end.

of ascrew-driver, case knife or other convenient implement whereby said"spreader may be turned. .The spreader 26 is disposed ,in servicedirectly above, and may be proximated to the opening of, the channel inthe column 10. By so disposing the spreader, the hot water deliveredbythe column 10 is received directly upon the spreader, and the breakingof the vglass of which the cover 28 is constructed, is 'so avoided.-

Operation: structed and arranged in 'a manner 'as above describedz andas shown in the accompanying drawmgs, the operation is as follows-:

so'I

With an apparatus -con-l The first step in the operation is to prepare 1the receptacle 12 by supplying the same with the charge of water 11. Thecolumn l10 is then installed, the base 15 thereof being adjusted overthe boss 25. The container 8 is then placed over the column 10 to restupon and'be floated by theA water 11. The holder 13 having been packedwith" ground coffee 20, the coverl 21 is set firmly on the end of thetube 18. In some instances, the end of the tube 18 is prepared to betterhold the nipple 23 by forming said end of' the tube of relativel softmetal, it being under-- 'stood that the union between the nipple 23 andthe end of the tube 18 is tight. The

holder I3 thus covered, is introduced above,

to slide over the upper end ofthe tube 9,

to be thereafter supported thereby, and thus indirectly be floated bythe water 11 in the receptacle 12, but .when suiicient water has passedto container 8, then holder 13 rests on, column 10. When the watertrapped within` the.. base 15 has been suiciently heated to rise in thecolumn 10, a further sup-ply isv drawn under the edge ofthe base 15 theheat of the water in said col.

being iucreased,.it is ejected through the open end of said column, toimping'e. on i the metal spreader 26. The water thus deflectedisfdeli-.vered to the tray-like top of .the-)cover 21 to pass:therethrough upon the coffee .pack 2.0, extracting the essence there#from, andenters. the containerv 8.'l As the hqurd coiiiejey accumulatesin the container 8, the specific. gravity of said container is varied,ca using the sameto relatively settle in the Water 11. The displacementof the ner averages the level of the Water 11 in the pot 12, until atthe end of the operation when all of the Water hasentered the container8. The above-described operation is continued until the entire body ofWater 11 has passed from the pot l2 to Within the container 8.

It will be observed that in the operation above' described, the liquidcoffee is never subjected to the direct influence of the heating medium,a body of Water being, up to the last, maintainedbetween the bottom'ofthe pot 12 and the container 8. Therefore, the liquid, after havingpassed through the coffee pack 20, is not again boiled or repassedthrough said pack.

The coffee is poured from'the pot 12 as in anypercolator of conventionalconstruction. y

In the present instance however, the coffee, instead of being held inthe bodyof the container 8, Will be delivered therefrom to the vspout 27of the pot When upt-ilted to pour the liquid fromsaid pot. In thisoperation, should the coffee overilovv from the container 8 to the bodyof the pot 12, no ill eifectsvvou'ld result therefrom. Further, if thesmall portion of Water remaining in tivo subscribing Witnesses.

i Witnesses:

the pot 12 should miX vwith the coffee, no other objection than a slightweakening of -the initially-poured coee'vvould arise therefrom.

Claim:

A percolator comprising a main Water receptacle; a holder for comminutedcoffee, arranged to permit liquid to pass therethrough; a supportingcolumn for said holder, said column having a chambered base resting onthe bottom of said receptacle for trapping Water delivered from saidreceptacle, for super-heating the same to lift the contents of saidcolumn above, for delivery to, said holder; a container for liquidcoffee disposed in guided relation to said column, said container beingcompletely immersed-in, to be floated by, Water in said receptacle,saidy container telescopically infolding, When lifted, said holder, theside Walls of said receptacle and said container being spaced apart forholding a body of Water surrounding said container to maintain the hea-ttherein and to prevent the boiling of the liquid coffee held thereby.

In testimoni/'whereof I have signed my name to this .specification inthe presenceof l/ VILLIAM D. COLLINS.

E. F. MURDOCK, 'PHILIPD RoLLHAUs.

